/*-
 * ========================LICENSE_START=================================
 * Smooks Commons
 * %%
 * Copyright (C) 2020 Smooks
 * %%
 * Licensed under the terms of the Apache License Version 2.0, or
 * the GNU Lesser General Public License version 3.0 or later.
 * 
 * SPDX-License-Identifier: Apache-2.0 OR LGPL-3.0-or-later
 * 
 * ======================================================================
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * ======================================================================
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * =========================LICENSE_END==================================
 */
package org.smooks.lang;

/**
 * @author <a href="mailto:tom.fennelly@gmail.com">tom.fennelly@gmail.com</a>
 */
public class LangUtil {

    public static final double JAVA_VERSION;

    private LangUtil() {
    }

    public static double getJavaVersion() {
        return JAVA_VERSION;
    }

    static {
        String versionSysProp = System.getProperty("java.version");
        StringBuilder versionBuilder = new StringBuilder();

        boolean gotDot = false;
        for (int i = 0; i < versionSysProp.length(); i++) {
            char c = versionSysProp.charAt(i);

            if (Character.isDigit(c)) {
                versionBuilder.append(c);
            } else if (c == '.' && !gotDot) {
                versionBuilder.append(c);
                gotDot = true;
            } else {
                break;
            }
        }

        JAVA_VERSION = Double.parseDouble (versionBuilder.toString());
    }
}
